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SpaceX launches starship Mega-Rocket and catches its booster in midair on first try.
(www.smithsonianmag.com)
This is a most excellent place for technology news and articles.
I think you've got too many zeros on your price estimate, no? The tower is huge, but there's no way it costs five hundred million dollars.
Are you including the R&D costs? Best estimates I've seen for a mechzilla put labour and materials between 65-95 million USD
Trying again doesn't necessarily mean trying again right away.